diff --git a/src/Tools/blocFissure/gmu/CMakeLists.txt b/src/Tools/blocFissure/gmu/CMakeLists.txt
index c0afb86be..64c18760a 100644
--- a/src/Tools/blocFissure/gmu/CMakeLists.txt
+++ b/src/Tools/blocFissure/gmu/CMakeLists.txt
@@ -51,6 +51,7 @@ SET(plugin_SCRIPTS
   facesVolumesToriques.py
   findWireEndVertices.py
   findWireIntermediateVertices.py
+  fissError.py
   fissureCoude.py
   fissureGenerique.py
   fusionMaillageAttributionDefaut.py
diff --git a/src/Tools/blocFissure/gmu/fissError.py b/src/Tools/blocFissure/gmu/fissError.py
new file mode 100644
index 000000000..74b058740
--- /dev/null
+++ b/src/Tools/blocFissure/gmu/fissError.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+class fissError(Exception):
+  """
+  usage:
+  try:
+    instructions()
+  except:
+    raise fissError(traceback.extract_stack(),"mon message")  
+  """
+  def __init__(self, pile, msg):
+    self.pile = pile    
+    self.msg = msg
+
+  def __str__(self):
+    return 'msg=%s\npile=%s\n'%(self.msg, repr(self.pile))
+  
diff --git a/src/Tools/blocFissure/gmu/partitionneFissureParPipe.py b/src/Tools/blocFissure/gmu/partitionneFissureParPipe.py
index 7d6289797..9ad26b854 100644
--- a/src/Tools/blocFissure/gmu/partitionneFissureParPipe.py
+++ b/src/Tools/blocFissure/gmu/partitionneFissureParPipe.py
@@ -6,8 +6,10 @@ from geomsmesh import geompy
 from geomsmesh import geomPublish
 from geomsmesh import geomPublishInFather
 import initLog
+import traceback
 from findWireEndVertices import findWireEndVertices
 from prolongeWire import prolongeWire
+from fissError import fissError
 
 def partitionneFissureParPipe(shapesFissure, elementsDefaut, rayonPipe):
   """
@@ -33,7 +35,12 @@ def partitionneFissureParPipe(shapesFissure, elementsDefaut, rayonPipe):
   cercle = geompy.MakeRotation(cercle, norms[0], math.pi/3.0 ) # éviter d'avoir l'arête de couture du pipe presque confondue avec la face fissure
   geomPublish(initLog.debug, cercle, 'cercle')
   fondFissProlonge = prolongeWire(fondFiss, extrem, norms, 2*rayonPipe)
-  pipeFiss = geompy.MakePipe(cercle, fondFissProlonge)
+  try:
+    pipeFiss = geompy.MakePipe(cercle, fondFissProlonge)
+  except:
+    texte = "génération du pipe le long de la ligne de fond de fissure prolongée impossible. "
+    texte += "Cause éventuelle : la ligne s'autointersecte lorsqu'on la prolonge."
+    raise fissError(traceback.extract_stack(),texte)
   geomPublish(initLog.debug, pipeFiss, 'pipeFiss')
   partFissPipe = geompy.MakePartition([shapeDefaut, pipeFiss], [], [], [], geompy.ShapeType["FACE"], 0, [], 1)
   geomPublish(initLog.debug, partFissPipe, 'partFissPipe')
diff --git a/src/Tools/blocFissure/ihm/fissureGenerale_plugin.py b/src/Tools/blocFissure/ihm/fissureGenerale_plugin.py
index 9e602ed68..e2d5d9dc1 100644
--- a/src/Tools/blocFissure/ihm/fissureGenerale_plugin.py
+++ b/src/Tools/blocFissure/ihm/fissureGenerale_plugin.py
@@ -41,6 +41,7 @@ def fissureGeneraleDlg(context):
   from PyQt4.QtGui import QMessageBox
   from PyQt4.QtGui import QPalette
   from PyQt4.QtGui import QColor
+  from PyQt4.QtCore import QString
   from fissureGenerale_ui import Ui_Dialog
   
   class fissureGeneraleDialog(QtGui.QDialog):
@@ -307,6 +308,7 @@ def fissureGeneraleDlg(context):
                   areteFaceFissure = self.ui.dsb_areteFaceFissure.value(),
                   reptrav          = str(self.ui.le_reptrav.text()),
                   nomres           = str(self.ui.le_nomres.text()),
+                  verbosite        = self.ui.cb_log.currentIndex()
                   )
       print dico
       return dico
@@ -325,7 +327,28 @@ def fissureGeneraleDlg(context):
         self.setLogVerbosity(logfile)
         from blocFissure.gmu import geomsmesh               # après intialisation log dans setLogVerbosity
         from blocFissure.gmu.casStandard import casStandard # après intialisation log dans setLogVerbosity
-        execInstance = casStandard(dico)
+        from blocFissure.gmu.fissError import fissError
+        try:
+          execInstance = casStandard(dico)
+        except fissError as erreur:
+          print '-'*60
+          print type(erreur)
+          print '-'*60
+          print erreur.msg
+          print '-'*60
+          for ligne in erreur.pile:
+            print repr(ligne)        
+          print '-'*60
+          texte = erreur.msg
+#           texte += +"<br>" +'-'*60 +"<br>"
+#           for ligne in erreur.pile:
+#             texte += repr(ligne) +"<br>"
+          mbox = QMessageBox(self)
+          mbox.setWindowTitle("erreur blocFissure")
+          mbox.setText(QString.fromUtf8(texte))
+          mbox.exec_()          
+#        except Exception as erreur:
+#          print "exception non répertoriée"
       self.NOK = NOK
       self.accept()